Whitelist stats go to stdout but not to report.xml

[BruceMty]

Whitelist stats are reported to stdout but not to report.xml.

Specifically:

When bulk_extractor initializes in main.cpp, it reads any alert list(s) and stop list(s) using function word_and_context_list::readfile in file word_and_context_list.cpp. Unfortunately, bulk_extractor does this before opening report.xml as pointer variable dfxml_writer *xreport, so it is not yet ready to write to report.xml.

To fix this:

• Move instantiation of xreport way up near the top, being careful not to disrupt behavior in the event of an error or if bulk_extractor is being restarted.
• Pass the xreport pointer as a new parameter to word_and_context_list::readfile() so that readfile can write the stats directly into report.xml.
• I recommend the same treatment of passing xreport to any function that prints to stdout wherever the user also wants the output to go into report.xml.

[simsong]

Do we have a test case for this?